/*
 * Copyright (c) 2004-2022, University of Oslo
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 * Neither the name of the HISP project nor the names of its contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.hisp.dhis.webapi.security;

import static org.hisp.dhis.dxf2.webmessage.WebMessageUtils.unauthorized;

import java.io.IOException;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.lang3.exception.ExceptionUtils;
import org.hisp.dhis.render.RenderService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.MediaType;
import org.springframework.security.authentication.DisabledException;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.web.AuthenticationEntryPoint;

import com.google.common.base.MoreObjects;
import com.google.common.net.HttpHeaders;

public class EmbeddedJettyBasicAuthenticationEntryPoint implements AuthenticationEntryPoint
{
    @Autowired
    private RenderService renderService;

    private String realmName;

    public EmbeddedJettyBasicAuthenticationEntryPoint( String realmName )
    {
        this.realmName = realmName;
    }

    @Override
    public void commence( HttpServletRequest request, HttpServletResponse response,
        AuthenticationException authException )
        throws IOException
    {
        String acceptHeader = MoreObjects.firstNonNull( request.getHeader( HttpHeaders.ACCEPT ), "" );

        response.addHeader( "WWW-Authenticate", "Basic realm=\"" + this.realmName + "\"" );
        response.setStatus( HttpServletResponse.SC_UNAUTHORIZED );

        String message = "Unauthorized";

        if ( ExceptionUtils.indexOfThrowable( authException, DisabledException.class ) != -1 )
        {
            message = "Account disabled";
        }

        if ( acceptHeader.contains( MediaType.APPLICATION_XML_VALUE ) )
        {
            response.setContentType( MediaType.APPLICATION_XML_VALUE );
            renderService.toXml( response.getOutputStream(), unauthorized( message ) );
        }
        else
        {
            response.setContentType( MediaType.APPLICATION_JSON_VALUE );
            renderService.toJson( response.getOutputStream(), unauthorized( message ) );
        }
    }

    public String getRealmName()
    {
        return this.realmName;
    }

    public void setRealmName( String realmName )
    {
        this.realmName = realmName;
    }

}
